Black Iron's Glory Summary:

Welcome to Freia. A continent where evil magi ruled. Until firearms came, that is. Now the people live free of those demons… More, however, must lurk beneath the surface. Claude, a transmigrator from another world, finds himself in the midst of this changing world, attending ‘middle school’. Or, as he calls it, ‘boot camp’. His destiny was to graduate and join the military, but the future is seldom so simple. His life, and the world, is set on the path of upheaval and chaos the day he finds a cookbook. A magical cookbook.